Guardian News & Media's commercial executive director, Adam Freeman, is to leave the newspaper publisher, as part of a wider restructure of senior management.

Freeman is to leave in October after a decade at GNM to launch a digital start-up, social advertising platform MutualMedia.co.

David Pemsel, who has been working as GNM interim chief marketing officer for the past year, has been promoted to the new position of chief commercial officer.

Chris Pelekanou, a 20-year GNM veteran most recently responsible for launching the commercial operation of the Guardian's US operation, is to leave the company in December.

Pelekanou is to take the role of commercial director at outdoor advertising company Clear Channel.

Pemsel, who earlier this year oversaw the Guardian's "Three little pigs" open journalism ad campaign, will lead all of GNM's commercial operations. He was previously group marketing director at ITV.

Tanya Cordrey, currently GNM's director of digital development, has been promoted to the new role of chief digital officer.

Cordrey, a former executive at eBay UK, joined GNM in 2008 from start up Zopa.com. GNM publishes MediaGuardian.

"I am delighted that David and Tanya have joined the GNM executive," said Andrew Miller, chief executive of Guardian Media Group, GNM's parent company. "These changes are part of our strategy to bring both GNM and Guardian Media Group closer together as we build a stronger, more digitally-focused organisation."

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